Made at the height of the Cold War, this Navy film provides an overview of the Navy's strategic undersea capabilities, with a focus on nuclear deterrence. Features footage of the nuclear powered USS Sturgeon (SSN-637), USS Skate (SSN-578) surfacing at the North Pole, the USS Triton (SSRN-586) circumnavigating the world underwater, the USS Nautilus (SSN-571), the Sturgeon class USS Parche (SSN-683), USS Skipjack (SSN-585), and the diesel powered USS Albacore (AGSS-569), USS Mang (SS-385). The film also shows the launch of SUBROC (UUM-44), an anti-submarine rocket similar to a cruise missile that can be fired through a torpedo tube. Also featured are shots of a Soviet K-class submarine. The USS George Washington (SSBN-598) the nation's first Polaris nuclear missile submarine is also shown, along with the USS Thomas Edison (SSBN-610). The film also features animation to illustrate how the Polaris A-1 missile has been modified in the A-2 and A-3 variants, to have increasingly long range. The new Poseidon missile is also shown. Various submersibles are shown, including the diesel powered Dolphin (AGS-555), the nuclear powered NR-1 (also known as Nerwin), the Atlantic Undersea Test and Evaluation Center's Autec I (later known as Sea Cliff DSV-4) and Autec II (also known as the Turtle DSV-3), along with the DSRV-1 (Mystic) and DSRV-2 (Avalon) deep submergence rescue vehicles which would be used to evacuate a crew from a stricken boat.